The atmosphere across South Texas became quite unstable on Sunday the 29th. Precipitable water had increased to around 1.7 inches by Sunday morning (the 29th), providing ample fuel for convective development.  The upper-level pattern consisted of a strong shortwave trough moving across northern Mexico with several weaker vorticity maxima embedded in the flow. There was also a 250 millibar jet streak approaching from the southwest with south Texas located somewhat favorably in the left exit region. Low-level wind shear was sufficient to develop and sustain supercells. At 21Z on the 29th, SPC analysis plots showed MUCAPE values of around 5000 J/kg over the southern coastal bend.  It was in this area where the first cells developed. An isolated shower over southwestern Nueces County quickly morphed into an HP supercell and produced very heavy rainfall and hail to the size of quarters over southern Nueces and northern Kleberg Counties. As the sea-breeze propagated to the west of the storms, the low-level wind backed more to the southeast, increasing the low-level wind shear even further. More storms began to develop to the north and west of the initial development as the main upper-level support began to affect the area and the sea-breeze moved farther inland. These storms quickly became severe and remained more scattered in nature for the next several hours, producing hail to the size of golf balls and very heavy rainfall in excess of 4 inches. Later in the evening, several cells over the Rio Grande Plains merged together to form a quasi-linear convective system which began to bow out as it approached the city of Alice. The rear-inflow jet was translated to the surface and winds of 64 mph were recorded at the Alice ASOS and wind damage was reported across the city. This line continued to move to the east, producing wind damage from Odem, to Robstown, to Kingsville before finally affecting Corpus Christi and moving into the Gulf of Mexico.

Hail in NUECES, TEXAS
From 29-MAY-05 20:45:00 to 29-MAY-05 20:45:00 (CST)
Location: CORPUS CHRISTI
Magnitude: 1.00 
Reported by: NWS EMPLOYEE(OFF DUTY)

Quarter size hail reported by NWS employee at Weber and Saratoga.

Thunderstorm Wind in NUECES, TEXAS
From 29-MAY-05 21:53:00 to 29-MAY-05 21:53:00 (CST)
Location: ROBSTOWN
Magnitude: 50 EG
Reported by: LAW ENFORCEMENT

Telephone poles were blown down near CR 38 and CR 81.

Hail in NUECES, TEXAS
From 29-MAY-05 20:52:00 to 29-MAY-05 20:52:00 (CST)
Location: CORPUS CHRISTI
Magnitude: 0.75 
Reported by: TRAINED SPOTTER

Penny size hail reported by trained spotter at Texas A&M Corpus Christi.

Hail in BEE, TEXAS
From 29-MAY-05 17:30:00 to 29-MAY-05 17:30:00 (CST)
Location: PETTUS
Magnitude: 1.75 
Reported by: LAW ENFORCEMENT

Hail in NUECES, TEXAS
From 29-MAY-05 16:13:00 to 29-MAY-05 16:13:00 (CST)
Location: BISHOP
Magnitude: 1.00 
Reported by: TRAINED SPOTTER

Quarter size hail reported by Skywarn spotter at Highway 70 and CR 75.

Hail in KLEBERG, TEXAS
From 29-MAY-05 16:44:00 to 29-MAY-05 16:44:00 (CST)
Location: KINGSVILLE
Magnitude: 0.75 
Reported by: TRAINED SPOTTER

Hail in LIVE OAK, TEXAS
From 29-MAY-05 19:00:00 to 29-MAY-05 19:00:00 (CST)
Location: CLEGG
Magnitude: 1.00 
Reported by: TRAINED SPOTTER

Hail in KLEBERG, TEXAS
From 29-MAY-05 21:55:00 to 29-MAY-05 21:55:00 (CST)
Location: KINGSVILLE
Magnitude: 1.75 
Reported by: LAW ENFORCEMENT

Golf ball size hail was reported by law enforcement at Highway 77 and FM 1717.

Thunderstorm Wind in JIM WELLS, TEXAS
From 29-MAY-05 21:24:00 to 29-MAY-05 21:24:00 (CST)
Location: ALICE
Magnitude: 55.7 MG
Property damage: 20K
Reported by: AWOS,ASOS,MESONET,ETC

Wind gust to 64 mph measured by ALI ASOS.  Several trees were uprooted across the city.  The Alamo Lumber Co. in Alice suffered straight-line winds damage, which included a large shed being destroyed along with fence and lumber material being destroyed.  Over 2000 Alice customers lost power during the storm.